Since it was super hot at the cabin (and no campfire ban), thought it would be a good plan to “test” the Cowboy Hot Tub Project. The goal was to place a hose/copper pipe in the campfire and run it back into the tub. The water would be pumped through the hose and come out warm on the other end. After 2 hours, the water should be a reasonable temperature.
Most of the parts were scavenged, but the stock tank was purchased used from a local farm for $200. The water tank measures 10′ long x 3′ wide by 2′ deep. It has two brace beams to keep the sides from falling out. The 300-gallon water tank was filled with a 1-1/2” PVC pipe from the water line to the cabin. More information about the parts can be found at the blog post on July 12, 2015
Once the tank was full of fresh lake water, the next step was to heat up the water to a comfortable temperature. To help push the water, I used a 12 volt DC pond pump. It was hooked up to a deep cycle battery and worked quite good.
I had bits and pieces of leftover, 1/2″ soft copper pipe from the old roof top water system. Using a car tire as a bending form, the pipe was bent into a coil. Built up a fire using the “log cabin” style and placed the copper pipe over the flames. It worked pretty well, but the fire needed to be hotter. I moved some the wood around and cut smaller pieces. It let it burn for a few hours and then called it quits for the day.
The next day, I looked around the shop and found a decent coil of 3/8″ soft copper. It was wound up in four coils and looked like it would do a better job. Attached the garden hose to the ends and started to work on the fire. This time, I found an old, round BBQ that had holes in the bottom. I looked for shorter logs and split them with an axe. The plan was to create a small, hot fire inside the old BBQ. Hopefully, the heat will be contained. Once the fire was going well, the coils over the fire. I kept adding pieces to the inside and outside of the coil.
This time, I noticed the temperature was a bit hotter. The extra coils did make a difference. What was really interesting, we the wind increased and blew on the campfire, the temperature increased incredibly.
At the end of the day, it was a good test for Cowboy Hot Tube project. I know what needs to be improved and I got a chance to sit back and enjoy the project. More improvements will follow in a few weeks. Thanks for watching!
For the past year, I been researching on how to build a wooden hot tub. If you haven’t seen one, it’s a six-foot round barrel about 4 feet high. Normally made from vertical laid Western Red Cedar planks that are fitted together. A heavy-duty banding is wrapped around the outside to keep the vertical planks from bursting. A snorkel style of wood stove is used to heat the water up. The stove sits just under the water line. Of course, I could pony up the $3500.00 a buy one. But, that’s not in the budget. The deck at the cabin comes first.
Anyway, after travelling on the internet, came across a story about another dude that wants to do the same thing…
“Hi folks, I am considering taking on the construction of an outdoor cedar hot tub. I want to build it using a joint that I have seen in use by kits I have assembled. The joint is called a canoe joint and it is used on 2×6 edges. I looked online to buy a shaper/router bit set to make this joint and have only found ones that have smaller radius than I need for my staves. Any help you can provide in a source for this bit set would be very much appreciated. Thanks, Jerry”
So, I’m like cool. I’m not the only one. Found a responder and he/she suggested a Round Nose Router Bit by Freud. Freud makes really sweet saw blades, but I haven’t tried the bits yet. Looks like I’ll head down to the local Windsor Plywood store and pick one up.
More to come…